html,
body,
h4,
p {
    padding: 0;
    margin: 0;
    text-align: center;
    font-size: 20px;
}

header,
footer {
    height: 25px;
}

.main {
    border-top: 1px solid #ccc;
    border-bottom: 1px solid #ccc;
    padding: 0 100px;
}

.left,
.right {
    background-color: #eee;
}

.middle {
    background-color: white;
}

.left {
    width: 100px;
    position: absolute;
    left: 0;
}

.right {
    width: 100px;
    position: absolute;
    right: 0;
}

.left,
.right,
.main {
    height: 190px;
}